Feed-water heater.



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H. G. MILLER. FEED WATER HEATER. APPLIUATION FILED JAn.1a.1ao6.

No. 839,867. PATENTED JAN. l, 1907. H. G. MILLER.

FEED WATER HEATER.

APPLIGATION FILED Ju.1a.x9ou.

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UNITED sTATEs PATENT oEEIoE.

IWW ASSIGNOR T() THE LOEVV HENRY G. MILLER, OF OLEVEL VELAND, OHIO, A CORPORA- MANUFAC'URING COMPANY, OF OLE TION OF OHIO.

FEED-WATER HEATER.

Specification of Letters Patent.

No. 839,867.' Patented Jan. 1, 1907. Application filed January 18,1906. Serial No. 29b.646. To all, whom t may concern: In the drawings, Figure 1 is an elevation Be it known that I, HENRY G. MILLER, a an apparatus embody-y citizen of the United States, residing at Cleveland, the county of Cuyahoga and State and partial section of ing my invention. FigH tion on the plane of t e line 2 2 in Fig. 1.

of Ohio, have invented certain new and use- Fig. 3 is a horizontal section on the plane of ful Improvements in Feed-Water Heaters, of the line 3 3 in Fig. 1 and a plan view of the 6o which the following is a specification. parts beneath the section plane. Fig. 4 is a V My invention relates to that class of feedvertical section on the planeof the line 4 4 in water heaters in which the heat derived from the exhaust-steam from the engine is used to raise the temperature of the water supplied to the steam-generator, and its novelty consists in the construction and adaptation of Fig. 5, and Fig. 5 is a horizontal section on the plane of the line 5 5 in Fi near its bottom and a similarly valve-con trolled steam-outlet conduit 12 near its to It has at its bottom also a drip-pipe 13. is expanded outwardlyT provided with an upper plate 15, rigidly secured thereto or made integral therewith. It is flanged outwardly at 16 at its bottom and is rovided with a ower plate 17 ,rigidly securedj thereto or made Within the casing ries of vertical water-tubes 20 20, arranged in groups. In the particular form of apparatus illustrated in the drawings these tubes are arrapidity of action, and eliciency in operation It are eiiectually secured.

One purpose of the invention is to give to the water to be heated a large circulation and at the same time to confine caused to enter tubes at passing upward in the same general direction the current of steam is discharged at the top. In such construction the water is not long in contact with the heated surfaces of the tubes through which it passes. In other devices the water enters the tubes at the top and falls by gravity through them to the bots are designated on the the several grou oman numerals I, II, III,

drawings b the tom. Such devices are even less elicient IV, V, and I, respectively. than the type irst referred to. In yet other It will be readil f understood, ofcourse, forms of heaters the water is circulated in a that each 0l the tubes is secured at and lower extremity to the platesll 17, respectively, and that all the tubes are open top and bottom.

Above the casing or shell 10 is the upper mixer 30, preferably coil or caused to pass upward and downward, or vice versa. In none of these forms, however, is the water caused to pass many times through the steam-chamber and yet the apparatus as a whole ke t small in size.

arranged prei other purpose o my invention is to spherical forni, provided with external iianges vent undue expansion of the metal arts of 31, whereby it can be firmly secured to the the device due to unequal heating at different casing 1() by means of bolts 32 32. It is dipoints. This isaccomplishedby carrying the vided into three chambers 33, 34, and b water from one side to the other of the heating-chamber, so as to equalize or balance to some extent the strain due to expansion.

tions 36, 37, and 38, the horizontal cross-sec tional area of each chamber beingr greater area of the two 2 is a horizontal seci,

. l. In the drawings, 10 is a shrl or casing hav- 65 ing a valve-controlled steam-inlet conduit 11 at 14 at its top and is 7o integral therewith. 7 5

ranged in siX groups of six members each, and 8o its u per 8 5 5 and) of hemi- 9o means of vertical water-tight radial part1- 95 other purpose of the invention is to mix than the cross-sectional the water..after it has absorbed heat in passgroups of water-tubes within the casm 1() ing through one series of tubes and before it immediately beneath it and with whic it roo communicates.

Beneath the casing 10 is arranged a casting 40, comprising a valve-controlled Water-inlet conduit 41, a water-outlet conduit 42, a blowoff pipe 43, `and a hand-hole 44. It vided by suitable partitions 45 into a number of compartments or chambers-viz,

a water-inlet chamber 50." communicating enters another series, in order that the temperature throughout the mass may be equalized andthe simultaneous discharge of bodies of water at different temperatures prevented, and a nal purpose is to bring the incoming column of cold Water in contact with the surffaces heated by the steam-vapor when the latter is at its highest temperature. 'f

is di- `group becomes well Vequalized; also, that in with the water-inlet conduit 41 and group .l ol' the watcr-tubes; a water-outlet chamber 5l, co1nmunicating with the w:ttor-outlet conduit. 42 and with group V l. ol' the watertubes; a mixing-chamber 52, which communicates with groups ll and lll` ol.I the watertubes, and another iuixugchamber 53, which coumuiuicates willi groups lV and V ol said tubes. 'lhe chambers 52 and 53 are lower mixing-chanibers having functions an.- alogous to those olA the upper mixing-chambers 33, 34, and 35, and their horizontal cross-sectional area is greater than that of the combined cross-sectional area of the tubes with which they communicate. It is largely this difference in area which insures the thorough mixing of the water in passing from one group oi tubes to the other.

The mode of operation of the device will readily be understood. The valve of thc steam-inlet conduit 11 being opened, the entire space within the casing 10 is soon filled with steam, and the valve of the steam-outlet conduit 12 being opened a current of steam through the casing is established. As the entering steam strikes the cool walls of the apparatus some of it is condensed and falls as water to the bottom ol' the apparatus, whence it can be drawn ofi through the drip-pipe 13, as occasion requires. The steam is led away for whatever future use may be convenient. The water-inlet conduit 41. is then opened, letting the comparatively cold water into the chamber 50. Thence it passe-s upward, forced by the pressure ot the oncoming liquid into the water-tubes 2() 20, constituting the group I. Reaching the top of these pi es it passes into the mixing-chamber 33, w `ence it falls through the group of water-tubes oi the group II by gravity until it reaches the lower mixing-chamber 52. It then crosses over through this chamber and up into the tubes of group HI into the upper mixingcliamber 34. Thence it falls through tne group of tubes IV to the lower mixing-chamber 53,whence it enters the group of tubes i and, at their top, passes into the upper mixing chamber 35, and iinally passes down through the group of tubes VI to the wateroutlet chamber 51 and the outlet-conduit 42.

It will readily be understood that iii crossi: g from group I to group il and from group III to group V in the up er mixing-chambers and from groups II to II and IV to V in the lower mixing-chambers the temperature of the water passing into the tubes of any one crossing from one side to the other of the casing in these inixing-chambers no sudden heating of the parts, causing undue eXpani sion, is apt to occur, and the strains due to expansion are balanced or compensated for. 1 If the groups oi these tubes were numbered in successive order, as the numerals'on the face ci a clock, it will be seen that the water 1 aegee? passes through the lirst, second, sixth, il'th, third, and fourth groups iu succession, thus passing' ll'om one side ol the apparatus to the other while at diil'erent degrees ol temperae ture.

The curvature or slope of' the walls of the upper inixing-chambers facilitate the mixing ol' the columns oi' water coming from the several tubes, because when the column ot water impiuges against such a wall it changes its direction, and when the directions of the dill'erent columns are thus changed a general interchange of particles takes place.

What l claim as new is-- 1. An apparatus of the kind described, comprising a casing, means for admitting steam into the space within, water-tubes arranged in groups of tubes about the center of the casing, means for admitting water into one oi said groups, means for conducting wat-er from groups of said series respectively to the groups on the opposite sides of said casing, and means for discharging the water from the group on the opposite side of the casing from the group into which it enters.

2. An apparatus et the kind described, comprising a casing and means for admitting the steam to the space within the same, water-tubes arranged in successive groups of segmental form about the center of the casing, and means for causin water to How consecutively through the tu es of the first, seci ond, sixth, fifth, third and Jfourth groups of the series.

3. An apparatus of the kind described, compri sing a casing and means for admitting steamto the space within the same, watertubes arranged ii. successive groups of segmental iorrn about the center of the casing and means for causin water to fiow consecutively through the tu es of the rst, second, sii th, fifth, third and fourth groups of the se rie., comprising Water-mixing chambers ar ranged intermediate the successive groups and alternately at the top and bottom of the casing.

4. An apparatus of the kind described, comprising a casing forming a steam-chamber, Water-tubes within said casing arranged in groups of segmental form about the center of the casing, a water-inlet chamber communicating with the lower ends` of the tubes of the first groups, a water-mixing chamber communicating with the upper ends of the tubes of groups one and two, a water-mixing chamber communicating with the lower ends of group two and group three on the opposite side of the casing, and water-mixing chambers communicating successively with the upper and lower ends of the succeeding groups.

5. An apparatus of the kind described, comprising a casing forming a steam-chamber, water-tubes within said casing arranged in groups of segmental forni about the center IOC TIO

of the easing, a water-inlet chamber communicating with the lower ends of the tubes of the irst group, u water-mixing chamber communicating with the upper ends of the tubes of groups one and two, e water-mixing chamber communicating with the lower ends of group twoA and group three on the opposite side of the easing, e Water-mixing Chmnber communicating with the upper ends of said group three end group four adjacent thereto, a Water-mixing chamber communieating with the lower ends of group four and group five on the opposite side of the easing, e Water mixing ohamber eoininunicetinv' with tho upper ends ol sind group five unil g'roup six adjacent thereto, and :L Water-outet chamber eommuniceting with the lower ends of seid group six.

ln testimoniv whereof I allix my signature in presence of two witnesses.

HENRY G. MILLER. Witnesses:

WILLIAM R. BAIRD, EMIL U. SAEL'IZER. 

